Admins will have the ability to set up rules around how an Office 365 group is named and will be able to block certain types of words from being included in a group name.
Yammer will improve the messaging experience through a number of initiatives. These will include GIF integrations, celebrating first posts and typing indicators that will enhance messaging for Yammer.
Yammer will call Yammer's API and surface conversations directly on SharePoint.
Yammer will show view counts of users who read your message.
Yammer will enable users to move threads from one group to another.